1. Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
2. Research Laboratories for Alcoholic Beverage Technologies, Kirin Co. Ltd., 1-17-1 Namamugi, Tsurumi-ku, Yokohama, Kanagawa 230-8628, Japan